What type of rock is the Thornton Quarry made of?

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asked Nov 27, 2019 108k views

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Adunahay · Answer 1 · 2019-12-01T11:41:21+0000

Near the surface the rock is buff and somewhat shaly, passing downward into a dense, blue gray, siliceous limestone. Mr. Brownwell states that the rock contains much bitumen or asphalt in pores and small cavities, and it also highly fossiliferous.

What type of rock is the Thornton Quarry made of?

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